Create and How to use your own Exceptions

Creating Your Own Exception Class

● Steps to follow
 
– Create a class that extends the RuntimeException or the
 
Exception class
 
– Customize the class
 
● Members and constructors may be added to the class
 
● Example:
 
 class HateStringExp extends RuntimeException {
 
 /* some code */
 
 }

How To Use Your Own Exceptions
 
class TestHateString {
 
 public static void main(String args[]) {
 
 String input = "invalid input";
 
 try {
 
 if (input.equals("invalid input")) {
 
 throw new HateStringExp();
 
 }
 
System.out.println("Accept string.");
 
 } catch (HateStringExp e) {
 
 System.out.println("Hate string!”);
 
}
 
 } }

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